It is just a matter when not if. You pay for warranties. You pay for glass and coatings. I have buddies that have done the same and sooner rather later their nickel and dime scope failed them. 270wsm is not a 338 mag.
338 has more bang and more recoil.
Spend $300+ and own a scope that will last a life time and has a warranty to back it up. You will see later in the evening woods and earlier in the fields. Next to each will be a No. 1 to 5, 1being preferred and 8 or least preferred.
Weaver Grand Slam App.$250 (2)
Nikon Monarch App. $300 (2) Due to field of view
leupold VX II App. $250 (3)
Burris Fullfield App. $199 (4) Due to customer service
Ziess Conquest App. $400 (1)
Leupold VX III App. $450 (1)
Bushnell Elite 4200 App. $350 to $400 (2) only due to short eye relief,3 in
Simmons atec p. $165 (5)
Tasco world Class App. $75 (
Spend the money you won't regret it. Rule of thumb - it is always better to spend more in optics than you would on the rifle.